Prompt

spf dkim dmarc email provider

Technology / API Platforms1 observationLast seen Oct 6, 2026

Latest observation

Oct 6, 2026OpenAI APIWeb search: off

SPF, DKIM, and DMARC are email authentication records you set up with your domain/email provider to help prove your emails are legitimate and reduce spoofing/spam.

What they do

  • SPF (Sender Policy Framework): says which servers are allowed to send email for your domain.
  • DKIM (DomainKeys Identified Mail): adds a digital signature to outgoing emails so recipients can verify the message wasn’t altered and came from an authorized sender.
  • DMARC (Domain-based Message Authentication, Reporting & Conformance): tells receiving mail servers how to handle messages that fail SPF/DKIM and provides reports.

Why they matter

Without them, emails from your domain are more likely to:

  • go to spam,
  • get rejected,
  • or be spoofed by attackers.

What you usually need from your email provider

Your provider will typically give you:

  • SPF include record (often a TXT record)
  • DKIM selector and public key (TXT or CNAME record)
  • DMARC policy (TXT record)

Typical example

  • SPF: v=spf1 include:_spf.yourprovider.com -all
  • DKIM: provider gives a selector._domainkey.yourdomain.com record
  • DMARC: _dmarc.yourdomain.com TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com"

Important notes

  • You should have only one SPF record per domain.
  • SPF should include all services that send mail for your domain (Google Workspace, Microsoft 365, Mailchimp, etc.).
  • DMARC works best once SPF and DKIM are correctly configured.

If you want, tell me your email provider (Google Workspace, Microsoft 365, Zoho, SendGrid, etc.) and I can give you the exact SPF/DKIM/DMARC records to add.

Observation history

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